Vibrating doffer for cotton gins



March 10, 1931.

H. OWEN v VIBRATING DOFFER FOR COTTON S LI NS Filed Sept. 50. 1929 2 Sheets-Sheet 1 March 10, 1931. OWEN 1,795,794

VIBRATING DOFFER FOR COTTON GINS Filed Sept. 30. 1929 2 Sheets-Sheet 2 gnme'ntoz v freeof the seed. The effectiveness of the gin- Fatented it liar. in, 1931 HOY own; or 'LUEKIN', TEXAS VIBRATING'DOFFEE FQB COTTON GINS Application filed September 30, 1929. Serial $0,396,111-

lvly invention relates to cotton gins. and more particularly to a dotter des1gned to more efiectively deliver the cotton to the gin saws.

In the .glnning of cotton ditficulty is experienced with the ordinary type ofcotton gin in a construction of means for delivering the cotton to the saws of the gin in such manner that it may be most effectively en aged by the gin saws and the lint thereby separated from the seed.

The gin saws rotate the roll of seed cotton above them and as this roll of cotton comes in contact with the teeth of the saws the lint is engaged by the saw teethand it is stripped ning operation depends to a great extent upon how well the roll of cotton'i s rotated. As the roll is -ordinarily,dependent upon the engagement-therewith of the saws for its rotation, it is not always possible to obtain satis-v factory results. where the rotating disc is employed to co-act with the saws to gin the cotton. .When the cotton roll is not rotated properly the friction of the saws may cause fire in the cotton.

Itis .the object ofiny inventionto provide a doiier located in a position above the gin saws and mounted to assist in bringing in the cotton into the proper pos tion for glnnlng and to assist in imparting a rotating move-i ment to the cotton roll.

I desire to prevent the passage of the cotton away from the saws and at the same time to move the cotton downwardly where it may be brought into a mostefl'ective position for ginning, at the same time assuring that the cotton cannot pack about the saws.

In the drawing herewith, Figure 1 is a broken sectional view through the housing of the cotton gin and showing the manner of mounting oi my improved doiier. Figure 2 is a fragmental view in vertical section on the plane 2-2 of Figure 1.

Figure 3 is a broken View similar to Figure l but illustrating a slightly different embodiment of the invention. 7

Figure 4 is atransverse section on the plane et-it of Figure 3.

It is to be understood that my invention is rear of the axis 01": the saws is a shaft 3,'su pside walls 5 of the housing.

This is particularly true width of thegin above the discQG It is-of mater al thickness as willbeseen from Figadapted to be used with cotton gins of any ordinary type of construction. I have therefore illustrated. only such portions of thegin asare necessary fora correct understanding otmy improved dofier. In the drawing thegin saws l are shown in broken detail illustratingthe upper edgesf oi saidsaws and it is to be understood. that these saws are mounted upon a shat-tor roller 2 of ordinary constructionandare ro tatable in the direction of the arrow.

The cotton is understood as being reads above the rotating saw blades; and. directly above said saws, and preferably a little to the ported "for ure2, and is preferably arcuatein end view. It is of slightly thinner cross section. at its upper edge and is theresecured to a rod or shaft 9. Said connection is ahinged com ne'ctio-n as willbe noted iiromF-igure 1. The rod 9 is supported upon a short plate .10 connected with a supporting-.rodor shaftll at its upper end.

- Itwill be seen from Figurel that the rod 11 is supported at its ends in the sidewalls-of the'housing. Theplate 10 isshort enough to move freely between the sides of the'housing and has a pivotal connection at its lower end withrod 9. Thus the plate 10' may have a slight swinging movement with rod 11- as indicated in dotted linesin Figure 2.

Thelower end of the doifer is wider and has its end concaved on the arc of the discs 6. The forward face of the doffer may be corrugated as shown in Figure 2 to better engage and move the cotton roll. The doffer is separated from the discs by a short distance and is adapted to be moved relative to the discs by means of an eccentric 12 secured upon a shaft 13. It is to be understood that there are two eccentrics 12 shown in dotted lines on Figure 1, mounted upon the shaft 13 and rotatable within an opening 1 longitudinally through the doffer plate. The shaft 13 is rotatable through a sprocket wheel 15, mounted thereon, and moved from any desired source of power.

When the gin is in operation the dofier will be given oscillating movement relative to the adjacen discs This oscillating movement is indicated by the dotted lines in Figure 2. The dofler will be raised slightly and moved the rear somewhat and then brought downwardly towards the disc and moved forwardly. cotton fed towards the gin saws will be moved downwardly and forwardly so as to be engaged by the disc 6 and carri d more effectively against the saws and the roll of cotton is moved by the doirer, it is given a retative movement in the right direction as will be clear from the arrow. It will be seen that the movement of the doifer 8 will be given some freedom at its upper end also through the swinging movement allowed at the upper end through attachment to the swinging plate 10. This doffer provides a most effective barrier against the passage of seed cotton away from the saws and also assists in moving the cotton into the proper position where it may be acted upon by the gin. It prevents clogging of the cotton roll, assists in its rotation, and thus avoids danger of fire.

In Figures 3 and a I have shown a slightly different arrangement of a dolfer. In this embodiment the dofier 8a is pivoted upon a stationary rod 16 at its upper end and swings upon said rod as a pivot. The doifer is'of comparatively the same shape as in the previous embodiment, being given an agitating movement by a somewhat difierent mechanism. A rod or shaft 17 extends longitudinally through the lower end of the dofier and a pair of swinging arms 18 are secured to said rod adjacent the end of said rod as will be seen in Figure 3. The arms 18 form a connection between the rod 17 and an eccentric 19 mounted upon an adjacent shaft 20, supported in the housing. It will be seen from Figure a that when the shaft 20 is rotated the eccentric thereon will communicate a reciprocating movement through the arm or pitman 18 thus moving the rod 17 and the dolfer back and forth from the full line position to the dotted line position in Figure 4. g

This embodiment is quite similar to that In this manner the seed shown in Figure 1. It is of slightly cheaper construction and its action is slightly different in that it is not so flexible as is the doifer shown in the first embodiment. This is due to the fixed mounting of the upper end of the doifer plate.

By the use of the dofier as shown and de scribed the cotton is prevented from passing the gin saws without being properly acted upon by the saws and the action of the dofler assists materially in moving the cotton into position where it may be more easily acted upon by the gin saws and prevents the accumulation of cotton at the upper side of the gin housing. The agitating movement imparted to the cotton roll prevents clogging of the roll against the saws and assists in its free rotation, whereby the best ginning action is obtained. The advantage of this construction will be understood by those skilled in the art.

Having thus described my invention what I claim as new and desire to protect by Letters Fatent is 1. In ajcotton machine including rotating saws and means to move cotton into contact with said saws, the combination of a doifer adjacent said means comprising a plate transversely of the machine, said plate being pivoted at its upper end, and means adjacent the lower end of said plate to give said dofl'fer a reciprocatin motion.

2. In a cotton machine including rotating saws and means to move cotton into contact with said saws, the combination of a dofier adjacent said means comprising a plate transversely of the machine and concaved on its forward side,said plate being pivoted at its upper end, and means adjacent the lower end of said plate to give said dof'fer a reciprocating motion.

3. In a cotton machine including rotating saws and means to move cotton into contact with said saws, the combination of a dofier adjacent said means comprising a plate transversely of the machine, said plate being pivoted at its upper end, and means to give said dofier a reciprocating motion.

4. In a cotton machine including rotating saws and means to move cotton into contact with said saws, the combination of a dofier adjacent said means comprising a plate transversely of the machine and concaved on its forward side, said plate being pivoted at its upper end, and means to give said dofier a reciprocating motion.

5. In combination with a cotton gin having gin saws therein, rotating discs inter-fitting between said saws, a dofler above said discs including a plate concaved on its forward side and pivoted at its upper end, and a rotating shaft operatively connected with said plate to give said plate a downward and forward movement. 7

6. In combination with a cotton gin having gin saws therein, rotating discs inter-fitting between said saws, a doft'er above said "discs including a plate concaved on its forward side and pivoted at its upper end, and a rotating shaft operatively connected with said plate to impart an agitation to said plate.

7. In a cotton machine having rotating saws, means to move the cotton into contact with said saws, and a dolfer plate pivoted above said saws and having its lower end adjacent said cotton movingmeans, and means to reciprocate said plate.

8. In a cotton machine having rotating saws, means to move the cotton intocontact with said saws, and a dolfer plate pivoted above said saws and having its lower end adjacent said cotton moving means, and a rotatable shaft adjacent the lower end of said plate and operative connections between said plate and said shaft whereby said plate is oscillated to move the cotton toward said means. I e

9. In a cotton machine having rotating said saws to separate the cotton lint from the seed, and a dofier plate above said saws to assist the saws in imparting a rotative movement to the cotton and means to move said plate downwardly .forwardly and upwardly to impart a rotative movement to the cotton roll in front of said saws.

In testimony whereof I hereunto affix signature this 23d day of September, A. D.

' HOY OWEN;

saws therein and means to move, the cotton 1 blades to move the cotton thereto, in combination with a doifer bladeabove said discs and having its upper end curved forwardly and connected to a pivotal support, and means to move said blade forwardly and downwardly.

11. A cotton gin including a series of gin saw blades, discs rotatable between said blades to move the cotton thereto, in combination with a dofi'er blade above said discs and having its upper end curved forwardly and connected to a pivotal support, and means to move said blade forwardly and downwardly, the lower end of said blade being concaved to conform to the curvature of said discs.

12; In combination with a cotton gin having gin saws therein, means co-acting with said saws to' separate the cotton lint fromthe seed, and a doffer plate above said saws to assist the saws in imparting a rotative movement to the cotton.

13. In combination with a cotton gin having gin saws therein, means co-acting with said saws to separate the cotton lint from the seed and means to prevent the passage of cotton above said saws and to assist said saws in the rotation of the cotton above the saws.

14:. In combination with a cotton gin having gin saws therein, means co-acting with 

